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MN10300: atomic_read() should ensure it emits a load 

atomic_read() needs to ensure that it emits a load (which it can do by using
ACCESS_ONCE()).

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2011-03-14 14:49:44 +00:00
parent dcca52c21e
commit af79420654
1 changed files with 1 additions and 1 deletions
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2
arch/mn10300/include/asm/atomic.h
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@ -139,7 +139,7 @@ static inline unsigned long __cmpxchg(volatile unsigned long *m,
* Atomically reads the value of @v. Note that the guaranteed
* useful range of an atomic_t is only 24 bits.
*/
#define atomic_read(v) ((v)->counter)
#define atomic_read(v) (ACCESS_ONCE((v)->counter))
/**
* atomic_set - set atomic variable